Re: [Jython-users] Jython, readline, and :

[Stefan <sd...@or...>]

On Wed, 20 Feb 2002 12:15:11 -0600
Brian Ericson <bm...@vi...> wrote:

> Anyone tried ":" (compound statements) with Bablok's readline (version 
> 0.7.0 on Linux)?  Esc-Tab over Tab will take a little getting used to 
> (especially since Tab itself in readline isn't all that useful), but 
> readline apparently doesn't like the last blank line needed to terminate 
> the statement...
> 
>  >>> if 1:
> ...     print 1
> ...
> Traceback (innermost last):
>   (no code object) at line 0
>   File "<console>", line 3
>         null
>         ^
> SyntaxError: invalid syntax
>  >>>
> 
> Is this a known issue?  Is there a workaround?  I don't want to go back...
> 
> 

Hi,
I got the same annoying error using the readline library.
I patched the ReadlineConsole.java which comes with the lib (contrib)
as follows to get around.
(Beside this, the library is rellay great!)

 /**
   * Write a prompt and read a line.
   *
   * The returned line does not include the trailing newline.  When the
   * user enters the EOF key sequence, EOFError is raised.
   *
   * This subclass implements the functionality using JavaReadline.
   **/
35  public String raw_input(PyObject prompt) {
36    try {
37      String line = Readline.readline(prompt.toString());
38      return (line == null ? "" : line);
39    } catch (java.io.EOFException eofe) {
40        throw new PyException(Py.EOFError);
41        } catch (java.io.UnsupportedEncodingException e) {
42          throw new PyException();
43        }
44  }

Note the differences at lines 37,38

It works for me.
Hope this helps.

--Stefan




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